HID: core: cleanup .claimed field on disconnect
authorBenjamin Tissoires <benjamin.tissoires@redhat.com>
Mon, 3 Nov 2014 20:33:32 +0000 (15:33 -0500)
committerJiri Kosina <jkosina@suse.cz>
Mon, 3 Nov 2014 22:31:19 +0000 (23:31 +0100)
When a subdriver is rmmod-ed then re-insmod-ed, the hid device is not
destroyed as it is owned by the transport layer.
So when we re-probed the device, the hid device is assumed to be already
claimed, and can lead to page faults if hid-core tries to forward the
emitted data to the to-be-created claimed node.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
drivers/hid/hid-core.c

index 73bd9e2e42bc3c7dfbd249c0a1d3d4e1c78a19f9..3402033fa52a7225c0a91846eba5237af8d08142 100644 (file)
@@ -1659,6 +1659,7 @@ void hid_disconnect(struct hid_device *hdev)
                hdev->hiddev_disconnect(hdev);
        if (hdev->claimed & HID_CLAIMED_HIDRAW)
                hidraw_disconnect(hdev);
+       hdev->claimed = 0;
 }
 EXPORT_SYMBOL_GPL(hid_disconnect);